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1 <br /> •'' ', 1386 EAST BEAMER STREET <br /> WEGE �'S�'ERN WOODLAND, CA 95695-9603 <br /> ' GED ENGINEERS FAX (916) 662-0273 <br /> CALIF CONTRACTOR#513857 A Co (916) 668-5300 <br /> �. REGISTERED GEOLOGIST M <br /> V <br /> ' <br /> A U 6 17 1892 <br /> �1�Vr"011MENTAL HEALTH <br /> Mr. John Margowski August 7 , 1992 <br /> Manager, Environmental Affairs <br /> Wickland Properties <br /> 1765 Challenge Way <br /> Sacramento , CA 95815 <br /> ( 916 ) 921-1100 <br /> RE: Authority to Construct Permit # AP 91-106 sampling of the <br /> influent-effluent of vapor extraction system, former Regal Station <br /> 604 , 1448 N. El Dorado Street and Harding Way, Stockton, <br /> California. <br /> Dear Mr . Margowski : <br /> As you have instructed, Western Geo-Engineers (WEdE)` is <br /> continuing to check the effluent and influent of the system as <br /> outlined in Permit # AP 91-106 , See Appendix A. The following are <br /> the results of the sampling for the period April 24 , 1992 to July <br />( 29 , 1992 . <br /> INTRODUCTION <br /> This letter documents the results of the ongoing sampling of the, <br /> active carbon scrub controlled, vapor extraction system at the <br /> above mentioned site . <br /> SITZ ST�I,TUS <br /> CURRENT OPERATIONS <br /> During July , 1992 , four new vapor extraction wells were installed <br /> 'while drilling conformation soil borings at the site. The wells <br /> are VS53 , VSB5 , VS89 and VSB11 . Vapor extraotxon well P1 was <br /> drilled up and destroyed at thka', time. The vacuum extraction <br /> system currently consists of two Rotron DR505 blowers pulling 57 . 7 <br /> cubic feet per minute (CFM) of soil vapor from the following <br /> wells: VSB3 , VSB5/P3swarm, VSB9 and VSB11 As of 07/27/92 the <br /> system is removing 16 .73 pounds per day of hydrocarbons. . <br /> i <br /> R604 vapor, 7/31/92 , p. 1 <br /> f ' <br />